GENERAL INFORMATION Quincy Models QPHT-20, 40, 60, 80 and 100 High SERVICE INQUIRIES: Provide Model No., Serial No., Temperature Refrigerated Dryers are designed to cool and Operating Pressure, Inlet Temperature, Nature of Problem. remove moisture from compressed air. The units cool air in See Dryer Specification Tag located on the control panel.
DISCLAIMER OF WARRANTY RELEASE AIR PRESSURE SLOWLY Fast moving air will stir up dust and debris, which If this unit is used to produce breathing air, the special may be harmful. Release air pressure slowly when equipment and precautions expressed in OSHA 29 CFR depressurizing your system to avoid bodily injury.
INSTALLATION INSTRUCTIONS NOTE: Improper installation methods of air inlet and air NOTE: Install brackets and support fixtures as needed to outlet piping that causes internal damage to the air dryer eliminate fatigue and vibration in the air system piping. system will void warranty. Installer should follow proper Drain Connection pipe installation practices or hire a certified plumber to Models QPHT-20 and QPHT-40 are equipped with a...
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refrigerant suction pressure should be within the following ranges. Model QPHT-20: 55 to 125 PSIG Model QPHT-40: 90 to 130 PSIG Model QPHT-60: 90 to 130 PSIG Model QPHT-80: 90 to 130 PSIG Model QPHT-100: 90 to 130 PSIG If the suction pressure gauge reads 0 PSIG or near 0 PSIG, contact Quincy or your Quincy dealer.
OPERATING INSTRUCTIONS Start the air dryer system by turning the switch to the Manually turn the coalescing oil filter drain stem ON position. At this time the compressor and once every 8 hours of operation, or when the sight cooling fans will start. of glass is half full of liquid.
MAINTENANCE & ADJUSTMENTS The ON/OFF switch holds a HIGH TEMP light which will turn on if the unit’s compressor system malfunctions. If the red HIGH TEMP light on this switch is illuminated, turn off and unplug the unit for 15 minutes and restart. If the light remains on after Depressurize dryer system...
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Condenser coil cleaning. Remove ambient filter (if equipped). Remove either the right or left side panel screws and panel. Using compressed air, blow collected dust and contamination off condenser from inside to outside. The air dryer system will not operate properly unless all panels are reinstalled Hot gas bypass valve adjustment.
TROUBLESHOOTING Table 1 — Troubleshooting Guide Symptoms Cause Remedy A. Moisture downstream. 1. Refrigeration compressor not a. Check electric power supply. running. b. If red light is on, call for factory service. 2. Suction pressure reads above a. Clean the air cooled condenser blue/green zone.
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Table 1 — Troubleshooting Guide Symptoms Cause Remedy E. Moisture is not draining. 1. Clogged solenoid valve. a. Press the PUSH-TO-TEST switch several times. b. Disconnect the drain lines to the solenoid valve and blow compressed air from outlet while pressing the PUSH-TO-TEST switch.